CN115715408A - Folding method and folding device of display panel - Google Patents
Folding method and folding device of display panel Download PDFInfo
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- CN115715408A CN115715408A CN202180000760.0A CN202180000760A CN115715408A CN 115715408 A CN115715408 A CN 115715408A CN 202180000760 A CN202180000760 A CN 202180000760A CN 115715408 A CN115715408 A CN 115715408A
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Abstract
The utility model provides a turn over a method, turn over a device of turning over of display panel, display panel (2) include main panel (21) and with at least one drive plate (22) that main panel (21) are connected, be provided with at least a set of counterpoint mark on display panel (2), every group counterpoint mark includes: a first alignment mark (A1) on the main panel (21) and a second alignment mark (A2) on the driving board (22); the folding method comprises the following steps: fixing a main panel (21) of a display panel (2) to a main stage (100), and fixing a drive plate (22) to a sub stage (200) (S1); controlling the secondary bearing platform (200) to turn over (S3) relative to the main bearing platform (100); acquiring positions (S3) of a first alignment mark (A1) and a second alignment mark (A2) on the folded display panel (2), and judging whether the first alignment mark (A1) and the second alignment mark (A2) in each group of alignment marks are both located at corresponding preset positions (S4); when one or more of the first alignment mark (A1) and the second alignment mark (A2) are not at the corresponding preset positions, the position of the auxiliary bearing platform (200) is adjusted until the first alignment mark (A1) and the second alignment mark (A2) in each group of alignment marks are at the corresponding preset positions (S5).
Description
The disclosure relates to the field of manufacturing of display equipment, in particular to a folding method and a folding device of a display panel.
With the development of display technology, large-sized display devices with relatively high contrast have been produced. A large-sized display device is formed by splicing a plurality of relatively small-sized display panels.
In some examples, a display panel for tiling includes a main panel and driving boards on both sides of the main panel, which need to be folded over to the back of the main panel before tiling. After the folding is completed, the splicing of a plurality of main panels can be realized, and a large-size display device is formed.
Disclosure of Invention
The present disclosure provides a folding method and a folding device for a display panel.
As a first aspect of the present disclosure, a folding method of a display panel is provided, where the display panel includes a main panel and at least one driving board connected to the main panel, and at least one set of alignment marks is disposed on the display panel, where each set of alignment marks includes: the first alignment mark is positioned on the main panel, and the second alignment mark is positioned on the driving plate; the folding method comprises the following steps:
fixing a main panel of the display panel on a main bearing table, and fixing the driving plate on an auxiliary bearing table;
controlling the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the driving plate to one side of the main panel, which is far away from the main bearing table;
acquiring positions of a first alignment mark and a second alignment mark on the folded display panel, and judging whether the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions;
when one or more of the first alignment mark and the second alignment mark which are not at the corresponding preset positions exist, the position of the auxiliary bearing table is adjusted until the first alignment mark and the second alignment mark in each group of alignment marks are at the corresponding preset positions.
In some embodiments, in each set of alignment marks, the sum of the numbers of the first alignment marks and the second alignment marks is greater than 2; when two driving boards in the display panel and the main panel are positioned on the same plane, a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line;
the determining whether the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions specifically includes:
judging whether a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line or not, and determining that the first alignment mark and the second alignment mark in each group of alignment marks are positioned at corresponding preset positions when the first alignment mark and the second alignment mark in any group of alignment marks are positioned on the same straight line; when a first alignment mark and a second alignment mark in at least one group of alignment marks are not on the same straight line, judging that one or more of the first alignment mark and the second alignment mark are not at corresponding preset positions.
In some embodiments, the obtaining the positions of the first alignment mark and the second alignment mark on the folded display panel specifically includes:
and acquiring the positions of the first alignment mark and the second alignment mark on the folded display panel in an image acquisition mode.
In some embodiments, each said drive plate is connected to said main panel by a flexible connection; the folding method further comprises the following steps:
fixing the driving plate on a secondary bearing table, and fixing a part of the flexible connecting piece on the secondary bearing table;
before the auxiliary bearing table is controlled to turn relative to the main bearing table, forming bonding glue on at least the surface of the flexible connecting piece, which is far away from the auxiliary bearing table;
and after the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions, curing the adhesive glue on the display panel.
The embodiment of the present disclosure provides a turn over a device for turn over a display panel, wherein, display panel includes: the main panel and with at least one drive plate that the main panel is connected, be provided with at least a set of counterpoint mark on the display panel, every group counterpoint mark all includes: the first alignment mark is positioned on the main panel, and the second alignment mark is positioned on the driving plate; the folding device comprises:
a main carrier configured to carry and fix the main panel;
a sub-carrier configured to carry and fix the driving board;
the driving mechanism is configured to drive the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the driving plate to one side, away from the main bearing table, of the main panel;
the position acquisition mechanism is configured to acquire the positions of the first alignment mark and the second alignment mark on the folded display panel;
the control mechanism is configured to judge whether a first alignment mark and a second alignment mark in each group of alignment marks are both located at corresponding preset positions, and send out a control signal when one or more of the first alignment mark and the second alignment mark which are not located at the corresponding preset positions exist;
and the adjusting mechanism is configured to adjust the position of the auxiliary bearing table according to the control signal until the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions.
In some embodiments, in each set of alignment marks, the sum of the number of the first alignment marks and the second alignment marks is greater than 2; the display panel comprises two driving boards which are respectively positioned at two opposite sides of the main panel, and when the two driving boards in the display panel and the main panel are positioned on the same plane, a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line;
the control mechanism is specifically configured to determine whether the first alignment mark and the second alignment mark in each set of alignment marks are located on the same straight line, and when the first alignment mark and the second alignment mark in any set of alignment marks are located on the same straight line, determine that the first alignment mark and the second alignment mark in each set of alignment marks are both located at corresponding preset positions; when a first alignment mark and a second alignment mark in at least one group of alignment marks are not on the same straight line, judging that one or more of the first alignment mark and the second alignment mark are not at corresponding preset positions.
In some embodiments, the position acquisition mechanism comprises:
the first image acquisition unit is configured to acquire the position of the first alignment mark on the folded display panel in an image acquisition mode;
and the second image acquisition unit is configured to acquire the position of the second alignment mark on the folded display panel in an image acquisition mode.
In some embodiments, the folding apparatus further comprises:
the side plates are arranged on two opposite sides of the main bearing table;
the mounting frame comprises a first mounting arm and a second mounting arm which are arranged oppositely, and a connecting arm fixedly connected between the first mounting arm and the second mounting arm; the first mounting arm and the second mounting arm are both rotatably connected with the side plate;
wherein the secondary plummer is connected between the first mounting arm and the second mounting arm; the driving mechanism is specifically configured to drive the mounting frame to rotate relative to the side plate so as to drive the auxiliary bearing table to turn relative to the main bearing table.
In some embodiments, the adjustment mechanism comprises: the first mounting arm and the second mounting arm are provided with the drivers respectively; the driver is configured to drive the end part of the secondary bearing table to move close to or away from the connecting arm according to the control signal.
In some embodiments, the actuator comprises a piezoceramic actuator.
In some embodiments, a side of the first mounting arm facing the second mounting arm and a side of the second mounting arm facing the first mounting arm are both provided with mounting grooves;
the folding device further comprises:
the bearing table mounting pieces are arranged at two ends of the auxiliary bearing table, and at least one part of the bearing table mounting piece extends into the mounting groove; the bearing table mounting piece can be displaced relative to the mounting frame along the extending direction of the first mounting arm;
two ends of the elastic telescopic piece are respectively connected with the auxiliary bearing table and the connecting arm;
a support member disposed on the connecting arm, the support member including a support end facing the secondary plummer;
the supporting piece has an extending state and a retracting state, and the distance between the supporting end and the connecting arm when the supporting piece is in the extending state is larger than the distance between the supporting end and the connecting arm when the supporting piece is in the retracting state and is larger than the length of the elastic telescopic piece when the elastic telescopic piece is in a natural state.
In some embodiments, the sub-carrier has a carrying surface for carrying the driving plate, and the sub-carrier is provided with a vacuum suction hole, and one end of the vacuum suction hole is located on the carrying surface of the sub-carrier.
In some embodiments, each of the drive plates is connected to the primary panel by a flexible connection, the secondary carrier table further configured to carry a portion of the flexible connection;
the control mechanism is also configured to send out a gluing signal before the driving mechanism drives the auxiliary bearing table to turn over; after the first alignment mark and the second alignment mark in each group of alignment marks are judged to be located at corresponding preset positions, a curing signal is sent out;
the folding device further comprises:
the gluing mechanism is configured to coat adhesive on the surface of the flexible connecting piece departing from the auxiliary bearing table according to the gluing signal;
and the curing mechanism is configured to cure the bonding glue according to the curing signal.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic view of a display panel to be folded provided in some embodiments of the present disclosure.
Fig. 2 is a partial cross-sectional view of the display panel after being folded.
Fig. 3A to 3C are schematic diagrams of alignment marks on display panels in different states according to some embodiments of the disclosure.
Fig. 4 is a perspective view of a folding device provided in some embodiments of the present disclosure.
Figure 5 is another perspective view of a folding apparatus provided in some embodiments of the present disclosure.
Fig. 6 is yet another perspective view of a folding apparatus provided in some embodiments of the present disclosure.
Fig. 7 is a schematic view of a secondary carrier provided in some embodiments of the present disclosure disposed on a mounting frame.
Fig. 8 is a cross-sectional view taken along line AA' in fig. 7.
Fig. 9 is a schematic view of a folding method of a display panel provided in some embodiments of the present disclosure.
Fig. 10 is a schematic view of a folding method of a display panel according to another embodiment of the disclosure.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The embodiment of the disclosure provides a turnover device for turning over a display panel. Fig. 1 is a schematic view of a display panel to be folded according to some embodiments of the present disclosure, and as shown in fig. 1, a display panel 2 includes: a main panel 21, and at least one driving board 22 connected to the main panel 21. Wherein, the main panel 21 is connected with the driving plate 22 through a flexible connecting piece 23a. The main panel 21 includes a light emitting device for display, such as a micro light emitting diode (mini/micro LED); the driving board 22 includes a driving circuit 22a for driving the light emitting devices to emit light.
In one example, the light emitting device and the driving circuit 22a are both disposed on the flexible substrate 23, the flexible substrate 23 is a continuous film layer, the material of the flexible substrate 23 may include Polyimide (PI), and the light emitting device and the driving circuit 22a may be connected through a signal line disposed on the flexible substrate 23, so that the driving circuit 22a may provide an electrical signal for display to the light emitting device through the signal line. The main panel 21 may further include a relatively rigid carrier plate 21a, such as a glass plate. The carrier plate 21a and the light emitting device are located on opposite surfaces of the flexible substrate 23; the driving board 22 may also include a relatively rigid carrier board on the surface of the flexible substrate 23 facing away from the driving circuit 22a. Of course, in another example, it is also possible to dispose the light emitting device on the carrier board, dispose the driving circuit 22a on the flexible substrate 23, and the flexible substrate 23 is connected to the edge of the carrier board on which the light emitting device is disposed, and the light emitting device and the driving circuit 22a may be connected through the signal line disposed on the flexible substrate 23. In the embodiment of the present disclosure, the flexible substrate 23 is taken as an example of a continuous film layer, wherein a portion of the flexible substrate 23 located between the main panel 21 and the driving board 22 is taken as the flexible connecting member 23a.
Among them, the display panel 2 may include one driving board 22; alternatively, the display panel 2 includes two driving boards 22 located at both sides of the main panel 21; alternatively, the display panel 2 includes three driving boards 22 located on three sides of the main panel 21; alternatively, the display panel 2 includes four driving boards 22 positioned on four sides of the main panel 21. The number of drive plates 22 is explained as two in the embodiment of the present disclosure.
In the embodiment of the present disclosure, the folding device folds the display panel, specifically, folds the driving board 22 to the backlight side of the main panel 21, and makes the folded display panel take the target shape. In the present disclosure, the "target shape" may be determined according to actual requirements. For example, the target shape is rectangular.
Fig. 2 is a partial cross-sectional view of the display panel after being folded, and as shown in fig. 2, in general, in the folding process of the display panel, the display panel forms the adhesive 3 at least on the flexible connecting member 23a before being folded. After the display panel is turned over, the bonding glue 3 is cured, so that the driving board 22 is fixed on the main panel 21 through the cured bonding glue 3, and in addition, the turning over process of the display panel needs to ensure that the gap between the side surface of the bearing plate 21a and the flexible substrate 23 is as small as possible after the display panel is turned over. However, when the carrier plate 21a is formed by cutting in the earlier stage, due to the limitation of the process conditions, the carrier plate 21a cannot reach the target shape, and further, when the folded display panels are spliced, the splicing seam between two adjacent display panels is smaller than a predetermined value. For example, when the folded display panel is rectangular, the splicing seam of the display panel after splicing can be smaller than the predetermined value, and actually, two adjacent sides of the carrier plate 21a are not perpendicular, so that the two sides of the folded display panel are not perpendicular.
In order to ensure that the display panel after being turned over can be in a target shape, in the embodiment of the disclosure, a group of alignment marks are formed on the display panel, and in the process that the turning-over device turns over the display panel, the display panel after being turned over is ensured to reach the target shape by detecting the positions of the alignment marks.
Fig. 3A to 3C are schematic diagrams of alignment marks on the display panel in different states according to some embodiments of the disclosure, where fig. 3A illustrates a distribution diagram of the alignment marks on the display panel in a flat state, and fig. 3B illustrates a distribution diagram of the alignment marks when the folded display panel reaches a target shape; fig. 3C is a diagram illustrating a distribution diagram of the alignment marks when the folded display panel does not reach the target shape. As shown in fig. 3A to 3C, each set of alignment marks on the display panel includes a first alignment mark A1 on the main panel 21 and a second alignment mark A2 on the driving board 22. Each first alignment mark A1 and each second alignment mark A2 have a preset position, and the preset position of each first alignment mark A1 (or the second alignment mark A2) refers to a position of the first alignment mark A1 (or the second alignment mark A2) when the display panel is turned over and the turned-over display panel reaches the target shape. And when the display panel is folded and the folded display panel does not reach the target shape, one or more of the first alignment mark A1 and the second alignment mark A2 is not in the corresponding preset position.
In one example of the present disclosure, the main panel 21 is connected with two driving plates 22, and the two driving plates 22 are respectively located at both sides of the main panel 21 in the first direction. In each set of alignment marks, the sum of the numbers of the first alignment marks A1 and the second alignment marks A2 is greater than 2, for example, each set of alignment marks includes two first alignment marks A1 and two second alignment marks A2, and the two second alignment marks A2 are respectively located on the two driving boards 22. In addition, for any set of alignment marks, when the display panel 2 is in a flat state (i.e., the driving board 22 and the active board 21 are located on the same plane), the first alignment mark A1 and the second alignment mark A2 in the set of alignment marks are located on a straight line extending in the first direction (as shown in fig. 3A); when the display panel 2 is folded and the shape of the folded display panel 2 is different from the target shape, the first alignment mark A1 and the second alignment mark A2 in the set of alignment marks are not located on a straight line extending along the first direction (as shown in fig. 3C); when the display panel 2 is folded and the shape of the folded display panel 2 is the target shape, the first alignment mark A1 and the second alignment mark A2 in the set of alignment marks are located on a straight line along the first direction (as shown in fig. 3B). The shapes of the first alignment mark A1 and the second alignment mark A2 are not particularly limited in the present disclosure, for example, the first alignment mark and the second alignment mark A2 may be circular, rectangular or cross-shaped. The first alignment mark A1 and the second alignment mark A2 in a certain group of alignment marks are located on a straight line extending along the first direction, which may specifically be: the central connecting line of the first alignment mark A1 and the second alignment mark A2 in the group of alignment marks is on a straight line extending along the first direction.
Of course, in other examples, after the display panel 2 is folded, the preset positions of the first alignment mark A1 and the second alignment mark A2 may also be other positions, for example, when the display panel 2 is folded and the folded display panel 2 reaches the target shape, in any group, the first alignment mark A1 and the second alignment mark A2 are on a straight line extending along the second direction. The second direction intersects the first direction (e.g., the second direction is perpendicular to the first direction). For another example, when the display panel 2 is folded and the folded display panel 2 reaches the target shape, the first alignment mark A1 and the second alignment mark A2 may be connected to form a predetermined pattern (e.g., a rectangle) in any one of the groups.
In some examples, when the driving board 22 and the active board 21 of the display panel 2 are located on the same plane, the first alignment mark A1, the light emitting device, the second alignment mark A2, and the driving circuit 22a are located on the same side of the flexible substrate 23, and the carrier board 21a and the light emitting device are disposed on opposite sides of the flexible substrate 23. In this case, the first alignment mark A1 and the second alignment mark A2 can be formed in synchronization with some signal lines or devices in the driving circuit, thereby simplifying the manufacturing process.
Fig. 4 is a perspective view of a folding device provided in some embodiments of the present disclosure, fig. 5 is another perspective view of the folding device provided in some embodiments of the present disclosure, and fig. 6 is still another perspective view of the folding device provided in some embodiments of the present disclosure, wherein fig. 4 and 5 respectively show two-angle perspective views of the folding device before the secondary carrying platform is not turned, and fig. 6 shows a perspective view of the folding device after the secondary carrying platform is turned. As shown in fig. 1 to 6, the folding device includes: a main carrier 100, a sub-carrier 200, a driving mechanism (not shown), a position acquiring mechanism, a control mechanism (not shown), and an adjusting mechanism 400.
Wherein the main carrier 100 is configured to carry the main panel 21. Optionally, the main bearing table 100 is provided with an adsorption hole, and the main panel 21 is fixed on the bearing surface of the main bearing table 100 in a vacuum adsorption manner; alternatively, the main platform 100 is provided with a fixing member, and the fixing member fixes the main panel 21 on the bearing surface of the main platform 100. Of course, the main panel 21 may be fixed on the main carrier 100 by other methods, so as to prevent the main panel 21 from being displaced during the folding process of the display panel. When the main panel 21 is located on the main carrier 100, the carrier 21a is located on a side of the flexible substrate 23 away from the main carrier 100.
The sub-carrier 200 is configured to carry and fix the driving plate 22; in addition, the sub-mount 200 may fix a part of the flexible connecting member 23a. Optionally, an adsorption hole is formed in the sub-carrier 200, and the driving plate 22 is fixed on the carrying surface of the sub-carrier 200 by vacuum adsorption; alternatively, the sub-mount 200 is provided with a fixing member for fixing the drive plate 22 to the mount surface of the sub-mount 200. Of course, drive plate 22 may be secured to secondary carrier 200 in other ways.
The driving mechanism is configured to drive the sub-carrier 200 to be flipped over with respect to the main carrier 100, so as to fold the driving plate 22 to the side of the main panel 21 facing away from the main carrier 100.
The position acquisition mechanism is configured to acquire the positions of the first alignment mark A1 and the second alignment mark A2 on the display panel after being folded. The manner of acquiring the positions of the first alignment mark A1 and the second alignment mark A2 by the position acquiring mechanism is not particularly limited. For example, the positions of the first alignment mark A1 and the second alignment mark A2 can be obtained by means of image acquisition.
The control mechanism is configured to determine whether the first alignment mark A1 and the second alignment mark A2 in each set of alignment marks are both located at corresponding preset positions. When one or more of the first alignment mark A1 and the second alignment mark A2 which are not at the corresponding preset positions exist, the control mechanism sends out a control signal. As described above, the display panel includes the two driving boards 22, and when the driving boards 22 of the display panel and the main panel 21 are located on the same plane, the first alignment mark A1 and the second alignment mark A2 of the same set of alignment marks are located on the same straight line. In this case, the control mechanism is specifically configured to determine whether the first alignment mark A1 and the second alignment mark A2 in each set of alignment marks are located on the same straight line, and when the first alignment mark A1 and the second alignment mark A2 in any set of alignment marks are located on the same straight line, determine that the first alignment mark A1 and the second alignment mark A2 in each set of alignment marks are located at corresponding preset positions; when a first alignment mark A1 and a second alignment mark A2 in at least one group of alignment marks are not on the same straight line, determining that one or more of the first alignment mark A1 and the second alignment mark A2 are not at corresponding preset positions, and sending out a control signal.
The adjusting mechanism is configured to adjust the position of the sub-carrier 200 according to the control signal until the first alignment mark A1 and the second alignment mark A2 in each set of alignment marks are located at the corresponding preset positions.
In the embodiment of the disclosure, after the sub-carrier 200 is turned over relative to the main carrier 100, and the driving board 22 is turned over to a side of the main panel 21 away from the main carrier 100, the position obtaining mechanism may obtain positions of the first alignment mark A1 and the second alignment mark A2, and if at least one first alignment mark A1 or at least one second alignment mark A2 is not located at a corresponding preset position, the adjusting mechanism may adjust the position of the sub-carrier 200, so as to adjust the position of the driving board 22 until each first alignment mark A1 and each second alignment mark A2 are located at respective corresponding preset positions, and at this time, the turned-over display panel is in a target shape.
In some embodiments, the folding apparatus may further comprise a glue application mechanism and a curing mechanism. Wherein, the control mechanism is also configured to send out a gluing signal before the driving mechanism drives the auxiliary bearing table 200 to turn over; and sending out a curing signal after the first alignment mark A1 and the second alignment mark A2 in each group of alignment marks are judged to be located at the corresponding preset positions. The glue coating mechanism is configured to coat glue on the surface of the flexible connecting piece 23a departing from the auxiliary bearing table 200 according to the glue coating signal; of course, the glue applying mechanism may apply the adhesive to both the partial area on the driving plate 22 and the partial area on the main panel 21. The curing mechanism is configured to cure the adhesive according to the curing signal.
Before the adhesive is cured, the drive plate 22 is bent to the side of the main panel 21 facing away from the main carrier table 100 and is initially bonded to the main panel 21. The viscosity of the adhesive before curing is very small, and at the moment, the shape of the folded display panel can still be adjusted. And after the adjustment is finished, curing the adhesive glue, thereby shaping the display panel.
The structure of the glue applying mechanism and the curing mechanism in the embodiment of the present disclosure is not particularly limited, and for example, the glue applying mechanism may include a container disposed above the sub-mount 200, the container being configured to receive and output the adhesive glue. The curing mechanism may include a curing light, for example, an ultraviolet light.
The folding device in the embodiment of the present disclosure is specifically described below with reference to the drawings.
As shown in fig. 4 to 6, the number of the sub-carriers 200 is two, two sub-carriers 200 are respectively disposed at both sides of the main carrier 100 in the first direction, and each sub-carrier 200 is used to carry and fix one driving plate 22. Of course, the number of sub-carriers 200 may be other numbers, for example, three or four.
Before the sub-platform 200 is folded relative to the main platform 100, the supporting surface of the sub-platform 200 and the supporting surface of the main platform 100 are located on the same horizontal plane, so that the display panel can be horizontally placed before being folded. After the sub-carrier 200 is turned over with respect to the main carrier 100, the carrying surface of the sub-carrier 200 is opposite to the carrying surface of the main carrier 100.
The main carrier 100 is provided with side plates 500 at opposite sides thereof in the second direction, and the side plates 500 and the main carrier 100 are maintained relatively fixed. For example, the side plate 500 and the main stage 100 are both disposed on the base. For another example, the side plate 500 is fixed to the main stage 100.
The auxiliary bearing platform 200 is arranged on the mounting frame 600, and when the driving mechanism drives the auxiliary bearing platform 200 to rotate, the driving mechanism drives the auxiliary bearing platform 200 to overturn relative to the main bearing platform 100 through driving the mounting frame 600 to rotate relative to the side plate 500. When the folding device includes two sub-bearing tables 200, the mounting frame 600 where the two sub-bearing tables 200 are located may be driven by the same driving motor, or may be controlled by two driving motors, which is not limited herein. When the two mounting brackets 600 are driven by the same driving motor, the driving motor can control the two mounting brackets 600 to rotate relative to the side plate 500 through a transmission mechanism, and the transmission mechanism can adopt a structure such as a gear, a rack, or other structures known to those skilled in the art, and is not limited herein.
FIG. 7 is a schematic view of a secondary carrier provided in some embodiments of the present disclosure being disposed on a mounting bracket, and as shown in FIG. 7, the mounting bracket 600 includes a first mounting arm 601 and a second mounting arm 602 disposed oppositely, and a connecting arm 603 fixedly connected between the first mounting arm 601 and the second mounting arm 602; the first mounting arm 601 and the second mounting arm 602 are both rotatably connected to the side plate 500. For example, the first mounting arm 601 and the second mounting arm 602 are both rotatably connected to the side plate 500 by a first rotating shaft 604. The sub-mount 200 is connected between the first mounting arm 601 and the second mounting arm 602.
Fig. 8 is a sectional view taken along line AA' of fig. 7, and as shown in fig. 7 and 8, a side of the first mounting arm 601 facing the second mounting arm 602 and a side of the second mounting arm 602 facing the first mounting arm 601 may be provided with mounting grooves V. Two ends of the secondary bearing platform 200 are both provided with bearing platform installation parts 605, and at least one part of the bearing platform installation parts 605 extends into the installation groove V; the stage mount 605 is displaceable relative to the mount 600 in the extending direction of the first mount arm 601. The two ends of the sub-mount 200 refer to the end of the sub-mount 200 close to the first mounting arm 601 and the end close to the second mounting arm 602. At least one elastic expansion piece 606 is arranged between the secondary bearing platform 200 and the connecting wall 603, and two ends of the elastic expansion piece 606 are respectively connected with the secondary bearing platform 200 and the connecting arm 603. For example, the number of the elastic expansion members 606 is two, and the elastic expansion members 606 are springs.
At least one supporting member 607 is disposed on the connecting wall 603, and the supporting member 607 includes a supporting end facing the sub-carrier 200. For example, the number of the supporting members 607 is two, and the supporting members 607 are jackscrews. The supporting member 607 has an extended state and a retracted state, and the distance between the supporting end and the connecting arm 603 when the supporting member 607 is in the extended state is greater than the distance between the supporting end and the connecting arm 603 when the supporting member 607 is in the retracted state and is greater than the length of the elastic expansion member 606 in the natural state. The natural state of the elastic expansion member 606 is a state in which the elastic expansion member 606 is not subjected to tensile force or compressive force. In one example, the connecting arm 603 has a mounting hole formed along the axis, a portion of the supporting member 607 is disposed in the mounting hole, and the supporting member 607 can extend and contract along the axis of the mounting hole, wherein the axis of the mounting hole is the same as the extending direction of the first mounting arm 601.
In some embodiments, the support 607 may be extended before the mounting frame 600 is driven to rotate relative to the primary carrier 100, so that the elastic expansion member 606 is stretched to apply a pulling force to the secondary carrier 200; when the sub-platform 200 is turned over relative to the main platform 100, the supporting member 607 is switched to the retracted state, at this time, the elastic expansion member 606 will continuously apply a pulling force to the sub-platform 200 during the turning process of the display panel, the pulling force is directed from the sub-platform 200 to the connecting arm 603, and after the sub-platform 200 rotates 90 ° (that is, the angle between the bearing surface of the sub-platform 200 and the bearing surface of the main platform 100 is smaller than 90 °), the elastic expansion member 606 applies a pulling force to the sub-platform 200, so that an excessive gap is not generated between the flexible substrate 23 and the side surface of the bearing plate 21 a.
In some embodiments, the upper and/or lower surfaces of the carrier mount 605 are provided with rollers 608 to minimize friction between the carrier mount 605 and the inner walls of the mounting groove V. For example, the rolling member 608 may be a ball plunger.
As shown in fig. 4, the position acquisition mechanism includes: the first image acquisition unit 301 is configured to acquire the position of a first alignment mark of the folded display panel in an image acquisition mode; the second image capturing unit 302 is configured to obtain a position of the second alignment mark of the folded display panel by an image capturing manner.
In some examples, the number of the first image capturing units 301 is plural, the first image capturing units 301 correspond to first alignment marks on the display panel in a one-to-one manner, and the positions of the first image capturing units 301 may be determined according to preset positions of the first alignment marks. For example, the first image capturing units 301 are cameras, and the position of each first image capturing unit 301 satisfies: when the folded display panel is in a target shape, the middle of the lens of the first image capturing unit 301 is opposite to the corresponding first alignment mark. Because the camera has a certain visual field range, even if the first alignment mark has a certain position deviation, the first alignment mark can still be captured by the camera. Similarly, the number of the second image capturing units 302 is multiple, and the second image capturing units 302 correspond to the second alignment marks on the display panel one to one. For example, the second image capturing units 302 are cameras, and the position of each second image capturing unit 302 satisfies: when the folded display panel is in the target shape, the middle of the lens of the second image capturing unit 302 is opposite to the corresponding second alignment mark.
As described above, when the display panel is in the flat state, the first alignment mark, the light emitting device, the second alignment mark, and the driving circuit are located on the same side of the flexible substrate 23, the carrier plate 21a and the light emitting device are disposed on opposite sides of the flexible substrate 23, and when the main panel 21 is placed on the main carrier 100, the carrier plate 21a is located on a side of the flexible substrate 23 away from the main carrier 100. That is, the first alignment mark is located on a side of the flexible substrate 23 facing the main carrier 100, and the second alignment mark is located above the flexible substrate 23 when the driving plates 22 are folded to a position opposite to the main panel 21. In this case, a receiving hole may be provided on the main stage 100, and the first image pickup unit 301 may be disposed in the receiving hole. The sub-stage 200 is provided to be transparent, and the second image pickup unit 302 is provided above the main stage 100, for example, on a stand above the main stage 100. The position of the second image capturing unit 302 may be fixed, or the support may be a movable support, so that the position of the second image capturing unit 302 is adjustable. In the present disclosure, the term "transparent" means that the light transmittance is 80% or more.
As shown in fig. 6 and 7, the adjustment mechanism includes a plurality of drivers 400, wherein the drivers 400 are disposed on both the first mounting arm 601 and the second mounting arm 602. The sub-stage 200 has a first end near the first mounting arm 601 and a second end near the second mounting arm 602, and the driver 400 on the first mounting arm 601 is configured to drive the first end of the sub-stage 200 to move closer to or away from the connecting arm 603 according to the control signal; the driver on the second mounting arm 602 is configured to drive the second end of the secondary stage 200 to move closer to or away from the connecting arm 603 according to the control signal.
As shown in fig. 8, the sub-mount 200 has a back surface opposite to its mount surface, and the mount 605 includes a support portion located on the back surface of the sub-mount 200. The supporting portion is provided with a protrusion 609, and the protrusion 609 extends to the position of the driver 400, so that the driver 400 can drive the protrusion 609 to move close to or away from the connecting arm 603, and further drive the end of the secondary platform 200 to move close to or away from the connecting arm 603. In one example, the driver 400 may be a piezoelectric ceramic driver, so as to drive the sub-carrier 200 to perform displacement in a micrometer scale, thereby improving driving accuracy.
Fig. 9 is a schematic view of a folding method of a display panel provided in some embodiments of the present disclosure, the folding method being used for the folding device. As shown in fig. 9, the folding method includes:
s1, fixing a main panel of a display panel on a main bearing table, and fixing a driving plate on an auxiliary bearing table.
S2, controlling the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the drive plate to one side of the main panel, which is far away from the main bearing table.
And S3, acquiring the positions of the first alignment mark and the second alignment mark on the folded display panel.
And S4, judging whether the first alignment mark and the second alignment mark in each group of alignment marks are both located at corresponding preset positions. When the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions, the shape of the folded display panel is a target shape.
And S5, when one or more of the first alignment marks and the second alignment marks are not located at the corresponding preset positions, adjusting the position of the auxiliary bearing table until the first alignment marks and the second alignment marks in each group of alignment marks are located at the corresponding preset positions.
Fig. 10 is a schematic view of a folding method of a display panel according to another embodiment of the disclosure, as shown in fig. 10, including the following steps S1 to S6:
s1, fixing a main panel of the display panel on a main bearing table, and fixing a driving plate on an auxiliary bearing table. Meanwhile, a part of the flexible connecting piece is fixed on the auxiliary bearing table.
And S2, controlling the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the drive plate to one side of the main panel, which is far away from the main bearing table.
And S21, forming bonding glue on at least the surface of the flexible connecting piece, which is far away from the auxiliary bearing table. Wherein the viscosity of the adhesive glue before curing is less than the viscosity of the adhesive glue after curing.
And S3, acquiring the positions of the first alignment mark and the second alignment mark on the folded display panel. Wherein, step S3 specifically includes: and acquiring the positions of the first alignment mark and the second alignment mark in an image acquisition mode.
And S4, judging whether the first alignment mark and the second alignment mark in each group of alignment marks are both positioned at corresponding preset positions.
Optionally, when the display panel is in the flattened state, the first alignment mark and the second alignment mark in the same group of alignment marks are located on the same straight line, in this case, the step S4 specifically includes: judging whether the first alignment mark and the second alignment mark in each group of alignment marks are positioned on the same straight line, and when the first alignment mark and the second alignment mark in any group of alignment marks are positioned on the same straight line, determining that the first alignment mark and the second alignment mark in each group of alignment marks are positioned at corresponding preset positions; when the first alignment mark and the second alignment mark in the at least one group of alignment marks are not on the same straight line, one or more of the first alignment mark and the second alignment mark which are not at the corresponding preset positions are judged to exist.
And S5, when one or more of the first alignment marks and the second alignment marks are not at the corresponding preset positions, adjusting the position of the auxiliary bearing table until the first alignment marks and the second alignment marks in each group of alignment marks are at the corresponding preset positions.
And S6, curing the adhesive. For example, curing is carried out by means of ultraviolet light.
In the embodiment of the disclosure, after the driving board is turned over to the side of the main panel departing from the main bearing table, the positions of the first alignment mark and the second alignment mark are obtained, and when at least one first alignment mark or at least one second alignment mark A2 is not located at the corresponding preset position, the position of the auxiliary bearing table is adjusted, so that the position of the driving board is adjusted until each first alignment mark and each second alignment mark are located at the corresponding preset position, at this time, the shape of the turned display panel is a target shape, so that when a plurality of turned display panels are spliced into a large-size display screen, the splicing seams of the display panels meet requirements.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.
Claims (13)
- The turnover method of the display panel comprises a main panel and at least one driving plate connected with the main panel, wherein at least one group of alignment marks are arranged on the display panel, and each group of alignment marks comprises: the first alignment mark is positioned on the main panel, and the second alignment mark is positioned on the driving plate; the folding method comprises the following steps:fixing a main panel of the display panel on a main bearing table, and fixing the driving plate on an auxiliary bearing table;controlling the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the driving plate to one side of the main panel, which is far away from the main bearing table;acquiring the positions of a first alignment mark and a second alignment mark on the folded display panel, and judging whether the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions;when one or more of the first alignment mark and the second alignment mark which are not at the corresponding preset positions exist, the position of the auxiliary bearing table is adjusted until the first alignment mark and the second alignment mark in each group of alignment marks are at the corresponding preset positions.
- The flipping method of claim 1, wherein in each set of alignment marks, a sum of the number of the first alignment marks and the second alignment marks is greater than 2; when two driving boards in the display panel and the main panel are positioned on the same plane, a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line;the determining whether the first alignment mark and the second alignment mark in each group of alignment marks are both located at corresponding preset positions specifically includes:judging whether a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line, and when the first alignment mark and the second alignment mark in any group of alignment marks are positioned on the same straight line, determining that the first alignment mark and the second alignment mark in each group of alignment marks are positioned at corresponding preset positions; when a first alignment mark and a second alignment mark in at least one group of alignment marks are not on the same straight line, judging that one or more of the first alignment mark and the second alignment mark are not at corresponding preset positions.
- The folding method according to claim 1 or 2, wherein the acquiring positions of the first alignment mark and the second alignment mark on the folded display panel specifically includes:and acquiring the positions of the first alignment mark and the second alignment mark on the folded display panel in an image acquisition mode.
- A folding method according to claim 1 or 2, wherein each of said driving plates is connected to said main panel by a flexible connection; the folding method further comprises the following steps:fixing the driving plate on a secondary bearing table, and fixing a part of the flexible connecting piece on the secondary bearing table;before the auxiliary bearing table is controlled to turn relative to the main bearing table, forming bonding glue on at least the surface of the flexible connecting piece, which is far away from the auxiliary bearing table;and after the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions, curing the adhesive glue on the display panel.
- A folding device for folding a display panel, wherein the display panel comprises: the main panel and with at least one drive plate that the main panel is connected, be provided with at least a set of counterpoint mark on the display panel, every group counterpoint mark all includes: the first alignment mark is positioned on the main panel, and the second alignment mark is positioned on the driving plate; the folding device comprises:a main carrier configured to carry and fix the main panel;a sub-carrier configured to carry and fix the driving board;the driving mechanism is configured to drive the auxiliary bearing table to turn over relative to the main bearing table so as to turn over the driving plate to one side, away from the main bearing table, of the main panel;the position acquisition mechanism is configured to acquire the positions of the first alignment mark and the second alignment mark on the folded display panel;the control mechanism is configured to judge whether a first alignment mark and a second alignment mark in each group of alignment marks are both located at corresponding preset positions, and send out a control signal when one or more of the first alignment mark and the second alignment mark which are not located at the corresponding preset positions exist;and the adjusting mechanism is configured to adjust the position of the auxiliary bearing table according to the control signal until the first alignment mark and the second alignment mark in each group of alignment marks are located at corresponding preset positions.
- The flipping mechanism of claim 5, wherein in each set of alignment marks, a sum of the number of the first alignment marks and the second alignment marks is greater than 2; the display panel comprises two driving boards which are respectively positioned at two opposite sides of the main panel, and when the two driving boards in the display panel and the main panel are positioned on the same plane, a first alignment mark and a second alignment mark in the same group of alignment marks are positioned on the same straight line;the control mechanism is specifically configured to judge whether the first alignment mark and the second alignment mark in each group of alignment marks are located on the same straight line, and when the first alignment mark and the second alignment mark in any group of alignment marks are located on the same straight line, determine that the first alignment mark and the second alignment mark in each group of alignment marks are both located at corresponding preset positions; when a first alignment mark and a second alignment mark in at least one group of alignment marks are not on the same straight line, judging that one or more of the first alignment mark and the second alignment mark are not at corresponding preset positions.
- The folding apparatus according to claim 5 or 6, wherein the position acquisition mechanism includes:the first image acquisition unit is configured to acquire the position of the first alignment mark on the folded display panel in an image acquisition mode;and the second image acquisition unit is configured to acquire the position of the second alignment mark on the folded display panel in an image acquisition mode.
- The folding apparatus of claim 5 or 6, wherein the folding apparatus further comprises:the side plates are arranged on two opposite sides of the main bearing table;the mounting frame comprises a first mounting arm and a second mounting arm which are arranged oppositely, and a connecting arm fixedly connected between the first mounting arm and the second mounting arm; the first mounting arm and the second mounting arm are both rotatably connected with the side plate;wherein the secondary plummer is connected between the first mounting arm and the second mounting arm; the driving mechanism is specifically configured to drive the mounting frame to rotate relative to the side plate so as to drive the auxiliary bearing table to turn relative to the main bearing table.
- The folding apparatus of claim 8, wherein the adjustment mechanism comprises: the first mounting arm and the second mounting arm are provided with the drivers respectively; the driver is configured to drive the end part of the secondary bearing table to move close to or away from the connecting arm according to the control signal.
- The folding apparatus of claim 9 wherein the driver comprises a piezoceramic driver.
- The folding device according to claim 9, wherein a side of the first mounting arm facing the second mounting arm and a side of the second mounting arm facing the first mounting arm are each provided with a mounting groove;the folding device further comprises:the bearing table mounting pieces are arranged at two ends of the auxiliary bearing table, and at least one part of the bearing table mounting piece extends into the mounting groove; the bearing table mounting piece can be displaced relative to the mounting frame along the extending direction of the first mounting arm;two ends of the elastic telescopic piece are respectively connected with the auxiliary bearing table and the connecting arm;a support member disposed on the connecting arm, the support member including a support end facing the secondary plummer;the supporting piece has an extending state and a retracting state, and the distance between the supporting end and the connecting arm when the supporting piece is in the extending state is larger than the distance between the supporting end and the connecting arm when the supporting piece is in the retracting state and is larger than the length of the elastic telescopic piece when the elastic telescopic piece is in a natural state.
- The folding device according to claim 5 or 6, wherein the sub-bearing table has a bearing surface for bearing the driving plate, and a vacuum suction hole is formed on the sub-bearing table, and one end of the vacuum suction hole is located on the bearing surface of the sub-bearing table.
- The folding apparatus of claim 5 or 6 wherein each of said drive panels is connected to said main panel by a flexible connector, said secondary carrier table further configured to carry a portion of said flexible connector;the control mechanism is also configured to send out a gluing signal before the driving mechanism drives the auxiliary bearing table to turn over; after the first alignment mark and the second alignment mark in each group of alignment marks are judged to be located at corresponding preset positions, a curing signal is sent out;the folding device further comprises:the gluing mechanism is configured to coat adhesive on the surface of the flexible connecting piece departing from the auxiliary bearing table according to the gluing signal;and the curing mechanism is configured to cure the bonding glue according to the curing signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/086954 WO2022217456A1 (en) | 2021-04-13 | 2021-04-13 | Folding method and folding device for display panel |
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| Publication Number | Publication Date |
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| CN115715408A true CN115715408A (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202180000760.0A Pending CN115715408A (en) | 2021-04-13 | 2021-04-13 | Folding method and folding device of display panel |
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| WO (1) | WO2022217456A1 (en) |
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| JP5013369B2 (en) * | 2007-05-18 | 2012-08-29 | Ｎｌｔテクノロジー株式会社 | Liquid crystal display device and manufacturing method thereof |
| CN105575275A (en) * | 2016-03-07 | 2016-05-11 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof and display device |
| CN106973485A (en) * | 2017-03-14 | 2017-07-21 | 惠科股份有限公司 | Display device and flexible circuit board thereof |
| CN107705709B (en) * | 2017-11-03 | 2020-01-03 | 武汉华星光电半导体显示技术有限公司 | Bending jig |
| CN110703479B (en) * | 2019-09-24 | 2022-03-29 | 上海中航光电子有限公司 | Display device |
| CN111383537A (en) * | 2020-04-02 | 2020-07-07 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
| CN111564113B (en) * | 2020-06-10 | 2022-03-29 | 武汉天马微电子有限公司 | Array substrate and display panel |
-
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- 2021-04-13 CN CN202180000760.0A patent/CN115715408A/en active Pending
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